<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix header-box">
        <span>文章分类</span>
        <el-button @click="addVisible = true" type="primary" size="mini">添加分类</el-button>
      </div>
      <el-table
        stripe
        border
        :data="cateList"
        style="width: 100%">
        <!-- type="index" : 渲染从 1 开始的索引号 -->
        <el-table-column
          width="50"
          type="index"
          label="序号">
        </el-table-column>
        <el-table-column
          prop="cate_name"
          label="分类名称">
        </el-table-column>
        <el-table-column
          prop="cate_alias"
          label="分类别名">
        </el-table-column>
        <el-table-column
          label="操作">
          <template v-slot="scope">
            <el-button @click="showEdit(scope.row)" size="mini" type="primary">修改</el-button>
            <el-button @click="del(scope.row.id)" size="mini" type="danger">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <el-dialog
      @closed="$refs.addForm.resetFields()"
      title="添加文章分类"
      :visible.sync="addVisible"
      width="35%">
      <el-form :model="addForm" :rules="addRules" ref="addForm" label-width="70px">
        <el-form-item label="分类名称" prop="cate_name">
          <el-input v-model="addForm.cate_name"></el-input>
        </el-form-item>
        <el-form-item label="分类别名" prop="cate_alias">
          <el-input v-model="addForm.cate_alias"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button size="mini" @click="addVisible = false">取 消</el-button>
        <el-button size="mini" type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>

    <el-dialog
      @closed="$refs.editForm.resetFields()"
      title="修改文章分类"
      :visible.sync="editVisible"
      width="35%">
      <el-form :model="editForm" :rules="addRules" ref="editForm" label-width="70px">
        <el-form-item label="分类名称" prop="cate_name">
          <el-input v-model="editForm.cate_name"></el-input>
        </el-form-item>
        <el-form-item label="分类别名" prop="cate_alias">
          <el-input v-model="editForm.cate_alias"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button size="mini" @click="editVisible = false">取 消</el-button>
        <el-button size="mini" type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'ArtCate',
  created() {
    this.getCateList()
  },
  data() {
    return {
      cateList: [],
      addVisible: false,
      addForm: {
        cate_name: '',
        cate_alias: ''
      },
      addRules: {
        cate_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
          { pattern: /^\S{1,10}$/, message: '分类名必须是1-10位的非空字符', trigger: 'blur' }
        ],
        cate_alias: [
          { required: true, message: '请输入分类别名', trigger: 'blur' },
          { pattern: /^[a-zA-Z0-9]{1,15}$/, message: '分类别名必须是1-15位的字母数字', trigger: 'blur' }
        ]
      },
      editForm: {
        cate_name: '',
        cate_alias: ''
      },
      editVisible: false
    }
  },
  methods: {
    async getCateList() {
      // 发请求获取分类列表
      const { data: res } = await this.$http.get('/my/cate/list')
      // console.log(res)
      this.cateList = res.data
    },
    addCate() {
      // 1. 兜底校验
      this.$refs.addForm.validate(async valid => {
        if (!valid) return

        // 2. 发请求
        const { data: res } = await this.$http.post('/my/cate/add', this.addForm)

        // 3. 根据结果提醒用户
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)

        // 4. 关闭 dialog
        this.addVisible = false

        // 5. 重新获取分类列表
        this.getCateList()
      })
    },
    showEdit(row) {
      // scope 不能用插值表达式渲染, $route 也不行, 如果需要看它们的内部成员, 可以在控制台打印
      // console.log(row)
      // 1. 让编辑框显示
      this.editVisible = true
      // 2. 渲染当前点击的数据项
      this.editForm = { ...row }
    },
    editCate() {
      // 1. 兜底校验
      this.$refs.editForm.validate(async valid => {
        if (!valid) return

        // 2. 发请求
        const { data: res } = await this.$http.put('/my/cate/info', this.editForm)

        // 3. 根据结果提醒用户
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)

        // 4. 关闭 dialog
        this.editVisible = false

        // 5. 重新获取分类列表
        this.getCateList()
      })
    },
    del(id) {
      // 判断 id 是否为 1 或 2
      if (id === 1 || id === 2) return this.$message.error('管理员不允许删除此分类!')
      this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async() => {
        // 用户点击了确认
        // 1. 发请求 (根据 id 删除数据)
        const { data: res } = await this.$http.delete('/my/cate/del', {
          params: {
            id
          }
        })

        // 2. 根据结果提醒用户
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)

        // 3. 重新获取分类列表
        this.getCateList()
      }).catch(() => {
        // 用户点击了取消
      })
    }
  }
}
</script>

<style lang="less" scoped>
.header-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
</style>
